To clarify the influence of aberrant EPB41L4A-AS1 expression on gastric cancer progression, we designed and obtained overexpression and silencing EPB41L4A-AS1 (pcDNA3.1-EPB41L4A-AS1 and si-EPB41L4A-AS1) fragments and transfected them into AGS and MGC-803 cells, and the transfection results were shown in Fig. 2A and B. In Fig. 2C, pcDNA3.1-EPB41L4A-AS1 reduced the proliferation rate of AGS cells, while si-EPB41L4A-AS1 promoted the cell proliferation, as did MGC-803 cells (Fig. 2D). Here, PTGDR is linked to gastric cancer.